AbstractSinglet oxygen (1O2) is of great interest because of its potential applications in photodynamic therapy, photooxidation of toxic molecules, and photochemical synthesis. Herein, we report novel metallophthalocyanine (MPc) based conjugated microporous polymers (MPc‐CMPs) as photosensitizers for the generation of 1O2. The rigid microporous structure efficiently improves the exposure of the majority of the MPc units to oxygen. The MPc‐CMPs also exhibit an enhanced light‐harvesting capability in the far‐red region through their extended π‐conjugation systems. Their microporous structure and excellent absorption capability for long‐wavelength photons result in the MPc‐CMPs showing high efficiency for 1O2 generation upon irradiation with 700 nm light, as evident by using 1,3‐diphenylisobenzofuran as an 1O2 trap. These results indicate that MPc‐CMPs can be considered as promising photosensitizers for the generation of 1O2.